The area of cross-section of a wire of length 1.1 metre is 1 mm². It is loaded with 1 kg. If Young's modulus of copper is  $1.1\times {10}^{11}\mathrm{N}/{\mathrm{m}}^2$, then the increase in length will be (If $\mathrm{g}=10\mathrm{m}/{\mathrm{s}}^2)$

• A

  0.01 mm

• B

  0.075 mm

• C

  0.1 mm

• D

  0. 15 mm